Hand sanders



Nov. 10, 1959 c. D. TRUSSEPL'. 2,911,769

HAND SANDERS Filed June 3, 1958 M E .q

' INVENTOR.

M A Cz/wiA/cf 0 721mm MEN," I fire/var United States Patent Clarence D. Trussell, Pine Castle, Fla.

Application June 3, 1958, Serial No. 739,596

*1 Claim. (Cl. 51-186) The invention herein disclosed relates to sandpapering devices of the type held in the hand. Objects of the invention are to provide the component parts of the sander in a form which can be quickly and easily combined ready for use and which, after full use of the sandpaper, may be as easily separated and worn sandpaper be replaced by fresh material.

Special objects of the invention are to provide this device in a simple practical inexpensive form, readily manufactured and practical and eflicient in use.

Other desirable objects and the novel features of construction, combination and relation of parts through which the objects are attained, are set forth or will appear in the course of the following specification.

The drawing accompanying and forming part of the specification illustrates certain present embodiments of the invention but structure may be further modified and changed as regards the immediate illustration, all within the true intent and scope of the invention as hereinafter defined and claimed.

Fig. l in the drawing is a perspective view illustrating an embodiment in which the sandpaper, folded and secured in the form of a sleeve is slipped over a correspondingly shaped tubular mandrel and held in place by folding one or both ends of the same over one or both ends of the mandrel.

Fig. 2 is a cross sectional view on the plane of line 2-2 of Fig. 1, showing in part how the ends of the sandpaper cover are secured together in abutting engagement by an underlying strip of adhesive tape which is backed up and supported by the underlying wall of the mandrel which forms the handle for using the sander.

Fig. 3 is a perspective view illustrating the sandpaper sleeve made up in the nature of a blank or refill ready to be unfolded and slipped into position for use on the hand block.

Fig. 4 is a longitudinal sectional view showing how the sandpaper sleeve may be made to closely and adjustably fit and hug the tubular supporting form by constructing each on a slight, wedging taper.

Fig. 5 is a cross sectional view of a further modification in which the hand block or form, of tubular construction, is braced by an intermediate bridge and this bridge is made with a deep groove into which the ends of. the sandpaper cover are tucked in abutting, holding engagement.

In Figs. 1 and 2 the holder is shown in the form of a length of tubing 7, rectangular in cross section and the sandpaper in the form of a sleeve 8 of a size to snugly fit the holder. In practice, the sandpaper cover is made up of a single length, suflicient to snugly surround the block with the edges meeting in abutting engagement as shown at 9, preferably creased as at 10, 11, 12, 13 to fit the corners of the block and secured in this tubular conformation by an adhesively secured strip or tape 14 underlying the meeting edge portions and normally of about the same width as the side of the block so as to form a continuous support and reinforcement of the meeting edge portions of the paper.

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Patented Nov. 10, 1959 Fig. 3 shows how the sandpaper may be made up in the character ofa refill, folded fiat to occupy small space and adapted to be opened up and slipped into position when it is to be used. -In this view it will be seen that the folds are located so that the connected sheet of sandpaper will fold fiat, suitable for compact shipping. This folded structure has a tendency, to spring open, making it a simple matter to fully open the tubular structure and to then slide it over the holder block.

Usually, it is preferred to make the sandpaper cover slightly longer than the block and then after positioning it on the block to fold the excess end portions inwardly over the end or ends of the block as indicated at 15. This may be accomplished by simply forcing the projecting ends of the cover material against any solid object.

To gain a tighter fit the block and the sandpaper sheath or cover may both be fashioned on longitudinally tapering dimensions substantially as indicated at 16, 17, Fig. 4. This taper may be relatively slight, just suflicient to afford a wedging fit of the cover over the block. After snugly engaging the cover on the block, the ends of the cover may be turned in as first mentioned to secure the parts in this close fitting engaged relation.

For the larger cross section sizes it may be advisable to reinforce the tubular holder with an internal cross bridge such as indicated at 18, in Fig. 5.

This bridge provides a location for a longitudinal groove 19 into which the ends of the sandpaper cover 20 may be tucked in the form of abutting closely engaged interlocked flaps 21. These flaps have a wedging engagement in the groove and so may serve to fully and firmly secure the sandpaper in place on the block. However, in this case also the cover may be made longer than the block and one or both ends turned in over the end or ends of the block as in the first described embodiment of the invention.

While usually it may be preferred to have the hand block of square or rectangular cross section it is contemplated that this may be in round, oval or other shapes. The construction of the block in tubular form is desirable for lightness and other reasons but it will be realized that the block may be solid or partly solid.

While primarily intended for abrasive scrubbing operations it will be realized that by choice of materials the invention may be applied to rubbing, polishing and other like finishing operations. The term sandpaper has therefore been employed in a broad sense, denoting a covering material suitable for the rubbing operations to be performed.

The folded-in ends of the sandpaper are relatively stiff and hold this cover material in place for all ordinary operations. The cover may be quickly released at any time by merely opening or unfolding the turned in tabs at one end of the holder, thus to leave the holder exposed at that end where it may be gripped and held while the cover is slipped off over the opposite end. A reload or refill cover may then be quickly slipped into position over the holder. The preformed covers may be made up inexpensively by putting the sheets of sandpaper through a creasing press to score or indent the sheets on the paper side at the lines of fold. This may be accomplished by placing the material, sand-face down on a rubber mat and die scoring the exposed paper face on the lines of fold.

After scoring the sandpaper blanks may be secured in tubular conformation on adhesive tape applying machines so manufacture of the reloads is relatively simple and inexpensive.

What is claimed is:

A hand sander comprising a hand held block of angular cross section having angularly related sides and a tubular sleeve of sandpaper in close fitting engagement over said block, said sleeve consisting of a single sheet of sandpaper having its ends brought together and connected in I abutting relation by an underlying strip of adhesively attached tape of substantially the area of one of the sides of said block and having fold lines along the opposite edges of said strip and on lines Corresponding to the edge'sof the other sides of said block -so that said sleeve aria-y be made up as described and be kept folded flat on said fold lines until ready for use and then be unfolded into tubular shape and slipped into position over said block with all sides of the same including that with the edges held together by the underlying strip of tape closely fitting the sides of the bloclc and thereby held in position on the block without need of other fastening means.

References Cited in the file of this patent UNITED STATES PATENTS Almond Dec. 11, 1883 Bein Sept. 3, 1912 Crofi Dec. 28, 1937 Froe nging Mar. 22, 1938 Miller et al. Dec. 25, 1945 Trussell May 6, 1952 

